Munition-projectile



UNITED sTATEs PATENT oFFrcE.

CHARLES ABBOTT BIISH, OF BROOKLYN, NEW YORK.

MUNITIoN-PROJECTILE. Y

To all wt'om t may concern .Y Be it known that I, CHARLEs ABBOTT BUSH, a citizen of the United States, residing in the borough of Brooklyn, city of New York, county of Kings, and State of New York, have invented certain new and useful Improvements in Munition-Projectiles, of which the following is a specification.

The invention relates to improvements in projectiles and has for its object to increase the accuracy and range by diminishing the frictional resistance of thek air or other medium through which the projectile travels by the lubrication of the surface of the projectile.

In the accompanying drawing, which shows a common form of projectile, is illustrated one form in which the invention may be embodied, but it will be understood that the drawing illustrates only one way in which the invention may be applied to an illustrative type of projectile and thatrthe invention embraces as well many other applications, varying in detail according to the type of projectile and otherwise. In the drawing is shown one form of device for automatically lubricating the surface of a munition projectile. A represents the projectile, B the explosive, which in this instance is carried by the projectile, C the fuse, and D the propelling explosive.

E is a receptacle or reservoir for the lubricant, as oil, formed in the projectile. In this instance the reservoir is shown as consisting of a longitudinal boring located toward the central part of the projectile, but the reservoir may be of other shapes and differently located, particularly when the invention is applied to projectiles of different type.

F represents a washer or piston within the boring E, acted upon by a spiral spring G and held against the force of said spring by a rod or cord attached to the washer and to a disk H, located in the base of the projectile. The disk or plug II, which may be screwed into the base, is provided with a pin H of inflammable material or highly fusible metal or material, which is fastened to or bears against the disk, and the rod or cord is engaged by this pin. A hole is also preferably made through said disk, which is sealed with paraffin or similar material.

I is a connection between the reservoir E leading to the surface ofthe shell, prefer Specification of Letters Patent. Patented July 22, 1919,

Application filed December 8, 1916.

Serial No. 135,746.

ably provided with a portion of smaller diameter J, adapted to be conveniently sealed by paraffin or a pin. If the reservoir is placed near the side of the projectile or a reservoir placed on each side, the connection between the reservoir and the point of the projectile may conveniently consist in part of a small tube fitted in a groove on the surface of the projectile.

The operation of the device is as follows: The washer F being drawn down against the spring G and held bythe rod or cord engaged by the pin in the disk H and the reservoir E being filled with oil or lubricant, preferably on both sides of the-washer F, the portion J of the connection is sealed with paraffin and the hole in the disk H, if one is used, is similarly sealed. Upon the explosion of the explosive D, the inflammable or fusible material holding the rod or cord is destroyed, disengaging the rod or cord and allowing the spring Gr to act against the washer F. At the same time the force of the explosion through the hole in the disk I-I assists in starting the device in operation and in forcing out the paraffin from the small portion J of the connec tion. The force of the spring against the washer F feeds oil or lubricant through the connection I to the surface of the projectile, where'it is distributed during its flight.

It is obvious that many modifications may be made in the application of the invention. The reservoir may be made of different shape and differently located, a small cylinder of compressed air or other force may be substituted for the spring, and other changes made without departing from the spirit or scope of the invention, which consists broadly in improving munition projectiles by automatically lubricating their surface to lessen the frictional resistance thereon during Hight.

I claim 1. A munition projectile carrying a reservoir to hold a lubricant, a connection between said reservoir and the surface of the projectile, and means for automatically forcing the lubricant from said reservoir to the surface of the projectile to lubricate the surface of the projectile duringv its flight.

2. A munition projectile comprising a reservoir for lubricant, a connection between said reservoir and the point of the projectile, means for forcing the lubricant from the reservoir through said connection, released by the discharge and operating during flight.

3. A munition projectile comprising a4 reservoir for lubricant having a connection With the surface of the projectile, a washer in said reservoir held against means for moving it by a connection with a material destroyed by the discharge, and means for moving said washer to force said lubricant through said connectionito the surface of the projectile.

4:. A munition projectile, comprising a reservoir for lubricant, a connection between said reservoir and the surface of the projectile, means for forcing the lubricant from said reservoir to the surface released by the discharge, and a connection between said forcing means and the chamber containing the propelling explosive adapted to be opened by the explosion therein.V

5. A projectile, comprising a body portion, a chamber adapted to be filled with lubricant, and devices for causing the lubricant to be removed from said chamber While the projectile is in Hight.

6. A projectile being provided with an outlet opening adjacent the forward end thereof, a chamber adapted to carry a supply of lubricant, and means for causing the lubricant to be discharged through said outlet opening when the projectile is in flight.

7. A projectile having the forward portion thereof provided with an outlet opening, a chamber adapted to be filled with suitable lubricating material, conduit means leading from said chamber to said outlet opening, and means whereby pressure is applied to the lubricant within said chamber when said projectile is in flight to discharge said lubricant from said outlet opening.

8. A projectile having an outlet opening adjacent the forward point thereof, a chamber adapted to carry a supply of lubricant, conduit means leading from said chamber to said outlet opening, and means to provide fluid pressure upon the contents of said chamber when the projectile is in flight whereby the contents thereof are discharged through said outlet openin g C. ABBOTT BUSH.

Copies of this patent may 'be obtained for ve cents each,`by addressing the Commissioner of Eatents. Washington, D. C. 

